Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3772f1626595624abdbe27b9f46a38f97835e22a550a67a656a315ee5e5ffff6' 
  AND token = 'u4IPV+QC84PIl5WCenLzJbK8z6EMSrzakmFS7nTi8eQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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