Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea66a5ad85159e921900d665988e74929a24d01a66c42a137e777faac5780570' 
  AND token = 'd2HAH208hDjp+aq3KIyEaSVYMfBQbYvh8kdfaErLcfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}