Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0498572a9063a7ddb9c5a12f2ce76433cc7623084338e5f18caaf2c65f1634a' 
  AND token = 'mlhRd/51y5kqDSXsSZiOfz3IOAX+s8uRvCycqUu0k1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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