SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b08d5a8430fd0d95045ef5cf2a7db86717dd509009547e40fc293b225f865cb' 
  AND token = 'fNgm7hwVjFDe2KRZBNARF5Xicv0f1l9UPwYvjA0bEZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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