Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dbc8dd06cf7e15e74923294b7d691bf0545c322ed2a84c3879a3655f20f69fd' 
  AND token = 'SoNVXwfrx1+lL3euv2Gn5PfND/kj/sealhu/b+9N/+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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