Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ba43ae151a8cec375ab27b547a160c9f9cec2dd20c86e1b702ef6ae67aded83' 
  AND token = 'JzLNB6iWP4MAdS4Th0zTO9l6JGcPFe93FZ4ELHyzZuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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