Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7248273fb4b0bf5aaa08d482938de0c6b180bf5775013240ddec8d98c9afd33' 
  AND token = 'ayxMoBxVQMspFovOp/JCw29J9gWSebUq6I8wvSc3mdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}