Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '605ecb4fa4dd43ee9f6f0a0f6f2bdcd836a99097c08603df50886deb7f59cd83' 
  AND token = 'xhLQcY3u1UYlad1slbU63TsYWcqEg78DYMAMr3syuNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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