Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59e127a0b4b8c0a0de2b3cafa3000a0b53180d629ce25bebb251cb4a196e363f' 
  AND token = 'OTmTRA9dZXl83YKSgV7SObfMyZ1Y6y11K5vGN1gD/w8=' 
  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"
    }
  }
}