Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bb6f6d4cb38404ddf69e364c1306b332772839ad2a7105090597ffc208cf239' 
  AND token = '/uyHfpm00b0UQTMmiGSCdoSc09t0NQJnMG3gASwhf6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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