Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64d28212d583f00a7c4f9f2ab0140095c879bf29e800e5fd4977198f458a4246' 
  AND token = '8OyR7IZW3fHmX3BFCMw5KUVFpzTAS8CR/Z2IaRapBT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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