SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '798744283d0cfb6899f63d0769d08580713c6215710d7ed7bef75397285a640d' 
  AND token = 'DtzpCkYXLKT0K/1qZaBmiOaU4jgJqO+d3MmYJywQZGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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