Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef994a06307168f80ef91c774f1ed53e437d17a9ce3a6b3ea3b0e63e32f7648' 
  AND token = 'yQlx/lbUMRj0S+VM8eX7z3992VIEwpnE3grJmEGqyfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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