Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '186c1d94de619664cdd63c51a9f34f61aadfcd3d1e431edbee5f7f4c00958959' 
  AND token = 'Q3yHI0RsajR4Op7DYsIyqHyCV/btaoU/sVrFkErsDM0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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