SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02f6892f1d2236e581c7f55b48ba625e794b59c3472227b542f171fddfdfc85f' 
  AND token = 'ZMuoOe9gvMm3S6J7y0o1jJ7yjuyPUGUolMBtlSezYCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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