Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '669291b0aff3e56566e756b75f89f611b2378b890698809de44ee1c7b1ba8ba0' 
  AND token = 'LlqPnhdJFytFrNqvDP+2rf+PfqqRFq+l1FdAhj9ToYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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