Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3c996ef0c658c7ae89d6b1175796fbece9fe1fcaac9642d565a35e237425c47' 
  AND token = 'piSCkveOPoErdEv904oqJAQMbiCXpr7SxGw14yKhOp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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