Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62438d84881f47c62952e53b23469cf065408f3ae004b2a784629bbe8d78c5e1' 
  AND token = 'fWcjAu5yfVRp7Vu17/OsThIrPIOV43XexLcxPRAzjdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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