Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ade79e9e4f154045a07376efe64e0a65f2ea39f7a50e25c5f934b3485ef473e' 
  AND token = '68lCLhEIOF6NgJRWK3yjnGx1KZjxh52AhDHP+r30+dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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