Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c9f759ca141428b0cf24d759e367b4ca68a68d41824ae7290112d743472be13' 
  AND token = 'm7LhSv+yGQ72yEz6MO6289Wv+mhwu5TWTlUrV4jmkwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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