Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c07a9d57f4455a567c174d4a5b0c0f633934ef3c2ddee1876d18da57338640df' 
  AND token = 'MkZEw4+4Sgt1Lr3KdtY9NldhDiLNU8OrdCJGH11ogk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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