Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fca3f0183b65713989a58ab8b4bbba8602870be1f0ef8d5ae24dc7ccc3c6e175' 
  AND token = 'C2h4cHoVvHdi6778pZGYCHkJfpUIbAkjGWWA3vfvvhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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