SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94f59a926dca712e467cf17a66a9d8af4dc033caa358fcad2608787553afa6cf' 
  AND token = 'lCzbNqGUVNVrckcBPoGZJ9OIUvdJfHw+Inf/VZ8TRBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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