Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2176a28fed22fa9e592b591f8c81618a2f75787c42ee85ae721fd90182935031' 
  AND token = 'aHXj1ptmnYUdgP6Oqs5dSOQKLoVQRKyMGZTOEOR+Flw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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