Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'adb7ff97e5fb0a9a6d44ae44b5fe2a4dbd5265b26b7f0a1e4ea199fd57450d26' 
  AND token = '/Pdr1SHTgt7fz1+tB8dFomsQWM77TvHQAgHOj9xx4jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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