Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd62420635ee1aa8a2d823bf9bc99f261b7f3a3cce3af941bd474a3122d0ccedd' 
  AND token = 'pU4HdJpv9f19yAkNLACdZzAN6kUfJ75Y0O07OBmdoqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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