Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5154f138cc2be85dc001e3f33a50932cef520e3d826ee0cd4e0f7e90b892f36' 
  AND token = 'U6GtQumzhabNyVhNMQDRtbxUdtAVfsHff/qHuVvSFqI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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