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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '071c1beaaa6f6b59be2797381b81983ff5ab4071bde3ac1313d42ef41bd78305' 
  AND token = 'EQA6a8M5WkKump5cu7uxHTX1xwTokCqVYDQhVDBRCqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}