Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce7dd8faf6cf2ba324ec0cb17dd6a91e7a0da629b7b2846b3dc48ecd6a7fbbf' 
  AND token = '+LypLEdXB+w6PYWo3mqVsJScNk0VkK2XYbbLiCu39+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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