Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b72e1b68252218f15f1af6bb48ac3b8b21ec2973de44b7efa1606de78eb16cf6' 
  AND token = '5tuvBvmOBihUiHwcJACCdy3gDiwx9fuohg47rpkiAnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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