SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '143d565b8d7a642a31f0ce7da9c2386ab83dfefa49510627c4f8bbeca0191559' 
  AND token = 'OVhSFVhYGxWZQy90kwRhdEeGjlde5+ygRFdeUuif+4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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