Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96437a32ccaa9912e4b4ab2640c808ee446742dd7010d6c69a30d202e3a5d3e1' 
  AND token = '+9TC6iZ6Isf7UA8DdqWxUB7d3HkwaKrjoDpmjKO9bps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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