Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99039c6baf771a61004aa46ad33c9b2896f76642f6b7f0e634dee90afbdd3bbd' 
  AND token = 'bSDcR6i9JJiF08WJOero44tcl1A78zrOzcG1ZzNdjgk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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