Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45026cc71fef4f9168457adeacd962b52059b2072ea68d3c9cc63a6e4e1a23fe' 
  AND token = 'agz4U84hrR8BmzYiwzascYVA1854FVpkKCM2H7EPVE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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