SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c5395514ddd609324acb98600783febb6e6a5fbc24e236ce64db53741dcd129' 
  AND token = 'wphtV70BQ78FhTXtCpbog65oYVAlGBm3J8k4dj4GkoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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