Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '097b25adea585968efa4ad0891629d38a362a24c791cdc9b6518fdd757672dba' 
  AND token = 'JEADjK2evDM83UsQ/ZEUDoECuV0C7CEcX1/yC0QjRpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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