Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7ca2c3ec549ea10d0de39c8bdf0517b714d4d5cbe0aecd664cbfec9fd4e566b' 
  AND token = 'zxk5PCFPPhXq0mulSzq2Aqos/tX72DKzVqFRKJj0L3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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