Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1375bb9f338b36d2d23abd48b8a77fd3c1d2719d1c3b0a654aad6d53b8387bd6' 
  AND token = 'l3dqVNoz7sJJFlZCtHINvA4J/H9/T7awuWkDb9JSr74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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