Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e9ef48c975348a2cd8eead26ee0ae49307d6aa7fa34ff7b4c958628b5e993ff' 
  AND token = 'E013Yd/qIspb9o2aT5NRZ/vjr1OMTPBqIgOL6K48nuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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