Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d9b135df6bfbe46173589a73bd8ce1149210f1ab361902e91e5cacffec51bf8' 
  AND token = 'yUdOn4IZ1VoLUJx6oHjHC57msR6Z2M8EQ7LIBaWKvyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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