Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e330f6833fd02b5467d7d9535c0e3560afe90d35e4e29c7600d7113fe351370' 
  AND token = 'j7e+hc6vNOsB1qXy3lxjhFnZlVi8Ym/zsMSKzENYh1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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