Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b368caf36aac7ac2b14a6c6463e88dc455ef58af3f2a5e2d82f8706753266a58' 
  AND token = 'ZAwrrM3IUq69rG7kHn8NGekZiMNHVmtbY9/7m1NRiVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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