Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41c4be1b7f517fd52aa8152121af8e96e51394d701c3f8a1ec8709304bb4851c' 
  AND token = 'gyb8NeJ1IueXSXv8vpP8TUihH6+RellLLIAZqw1qMTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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