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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09c3326718e68e8574e2ce6e52f97948f2e7adcc1750aaf80c384cc9a23ba33b' 
  AND token = 'K1nWwaUAjRIr1HdCOH9fOSW/6FRDNnJdypHhePbdRYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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