Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f8a61f30072d3576c4c2e155d8c46bfbc15ac4c26eb2882ebc4d67133e5ac5f' 
  AND token = 'Cr4xvO+73OUuKS38qJROR0O1yOLs+iLlSr+3dvgOPNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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