Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f09ee8bfd03249fb513d8d91a84d9506c9998abc48f0b5f829298e69ca496e90' 
  AND token = 'b8i3R0kqq+LIRfVSImY9R1RnP3TkeLJN4O0eOXyv60Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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