Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5320ca86451ba5eec6b1b8acd86d1b130bd0383236432fd6a0e5d7f51a730f73' 
  AND token = 'CvJ8Wtw+MfWCsB0YdgJo4/HpogbhdxzrYG617Gj/FWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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