Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5a03f816b0c3fe21d3aa8d2890248270dba432ce0a42f4eea4cc7b232e2f7d7' 
  AND token = 'LdX/VV1Vgb5iY7fas+xBoDtXRyng2P0obpL6z3rQHk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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