Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5926b289abb51d46d62e6ac01700687dce4e75cef72ab170717062e784ca6a38' 
  AND token = 'AYMMg+cRN/nLJTfzWIhftOVj9hr2RS6xfQOQvgccpio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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