Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7059d428c2ec4948db0996762124e99f9d582adacfa5774b75fa1ecdfe70616' 
  AND token = 'QbvAAzwQWYs7be59BPys2KGa18X9zR4jOYFzxuOmuUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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