Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99d1ca83c89f32ad58812bfd826064731cc7bb9c55f4e7c778597a85a355c707' 
  AND token = 'XC4/Mkc0ZyiRZW7YFYC2hMsfSDcb/xExaPnT+cG89rM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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