Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a395a24f87798b77cd3afa4137e6bfc02a14068c2fcef339a0f9bbc72c84e318' 
  AND token = 'feFqP3FXcpbKQrzRXb5PWvrLMYJsYyiZMNFJbfFZn2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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