Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b9201a83399d94b643af06c48e24322241a86d32782a8bc31a660e66980a44e' 
  AND token = '40CPmQ6KfLWgBWVeh6zTK/Rx6S4V2XMTE1PODj+CS0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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