Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f57585740fe2ebef7f623bbb37809f7f0e6a08a689e81782511ad2595652ea01' 
  AND token = 'ZlAZCggbRKuhRSLQcJ7nziGqiLMjgG350RygyXYTJDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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