Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f911e4cae80d2ae756483901327e3201fa53eccef7fcd0024e4d2d68c29b2ec2' 
  AND token = 'RiXKv9tmfjmElezrfEMcFfPxud7Ma7O4sbbOdwU/7mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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