Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2874210c28b0a1ca9e0b2a09fa34c4ea1e4ea64da2c83021fb0b4bad3887dc8' 
  AND token = 'o2QTABmoBlEeyhzHJbIql2nIobWV6LB+Y67LCZlmUeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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