Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37d534c7dbe4dcb500e989be5b302bacdb01882fcd33556d31047fae9186766e' 
  AND token = 'GjqNdsc7KU2yCPOVCZH18mW9RoqziRuS6EllRSm7iDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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