Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5105810010f9a456c26f6ce02d0f445fb110c9c7381e68ed23cd73e43c55e560' 
  AND token = 'tPYdnDejHQ67GEOwOliaMOt77cJBhJ1WhNDFlmEaDLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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