Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b41be639d3a537449c6383f36cf37e8e39850de2c8cfeae4b8542a813e2ee9e5' 
  AND token = 'EGpFpuIsfheLOp9YPwyjKjHXyHOI3/OhAMgSHzLys8Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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