Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f9d6427d73791000f0dc786fa0f9d977a9cde0adcf906ab72a2b43cdc352ee8' 
  AND token = 'q4rNnFZbUi4zOSHyZbdjPJvGw8JoDvx6BFOmsxee13k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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