SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0bc53ad6fca49ef5de6ba55db6c388e3d93d4ce6efb51261159b32ec81e9d724' 
  AND token = 'gj8qXkRZos7P/8nzR+4YYAk3X8MxW9NROvSZU6/MghQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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