Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '787b2b9a85ec1eae7868781ca29b0ae03f677f4485f7068125f210ee6d3b85da' 
  AND token = '/01qLHUZoDODxoTzbova1l+HVnECXF7yBoPLJJ9bOmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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