Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7265fa7591f6020fc8a34e7b0f7084b0716c1e1c03c4f7bb8ac3ac8218a27ed' 
  AND token = 'bSdxvTRSHXTmTcJrvOleWNC8c3N+tCiCExarEda33CA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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