Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7183e7e233452addfab616d78956ea34650711f7379bafeb5c9ff71b37d75e3' 
  AND token = 'iQp5dS/0UKivg6ZQwxMyQ0bAL/KhOK/fQvQF6zkusPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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