Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ef5063efaa2aa0d8c9849154d8200b408a8c5cf1557615ed63d2ac348a02f9e' 
  AND token = 'T+BF8+3quiomLw8kVBN4f7JjjUF1oOrlx3vaHHck+tA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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