Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a90a5a7507b9e29946307411993d8303a20de691921454f5db4374ed41bd31b9' 
  AND token = 'kmsvWOXsS+gbD5Tjvu/z8xVHB2haZX55TW1pco3eR10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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