Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '272195149d538396d63d2971c0307347f2ab54b808a4aa93d22f4c419ebdd215' 
  AND token = '3xPi24Xh+JRBdF28s4GMp3ZJMgcY/MuimCpGdz1M5mo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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