Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b181eb7f97664c3bb86bacb48be16266f63b94c8df3bff95c35f8f39b32a1e2d' 
  AND token = 'NshkPbSbbXB5S2/RWOTwOB6+21kzksAQLrIYOFsN7VQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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