Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'df6abf72ff46c83eea1e9d4640146d2121d165a358d072e50ab4a6380cdc321d' 
  AND token = 'Z3LeegpuXXJQrKfSq080duxhjcMdYMKAT1kM+kwxZD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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