Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5897383381d9caad73b94957e8caa181f51c6dbd582076955290972ffda9f477' 
  AND token = 'MKo+vMdWQyh3/Cs7zuUPBl9Zr3ckSBEoQMzar3lb/7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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