Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9906d14b920e4f54ef94f46d2d6a7c64dc117e58587c0a853b01e26fc383c34b' 
  AND token = '1EzYO8V5Ic3DNlfJ+ylQzEQiRnJhJleWu4Nx63doJB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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