Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9918f024ca5c9da0696ea7ade3dcff7972cb5102641d95dab24c1251dea1c4' 
  AND token = 'f462+Z9QRf41tWXlRm6ECpyEXDxpTShN6veWCXW69r8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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