Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdb81e8233bb8a3ef6e92258d0af863c53839c00148f5e33f6c92b213dbb4f11' 
  AND token = 'XL1sonNwAMGF4PXoRq+JiCZ6fQdz+1zebs31R1iG7vs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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