SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4067b131c0ad332964d40febcd33ae15257d1975974a8f5232e9e76860554fcc' 
  AND token = 'hVyfmGwpSYwbroeg7xf4TJ71gpcKuyodCW6EHvf++ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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