Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '816a3c0de2909076c97c75dba457b26216423e384fbff318b716e8406117e8c0' 
  AND token = 'jrk1mVOfTj5Z4/iJO0fTbU+ElMSmy8i0ywhpw5AcX8w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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