Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc1ba2e70eefda5754315c1662dd6eeb0ac8d39f19f47cc825d2355880d51a0a' 
  AND token = 'Hhsz8gQpIjKxQM9AHPhZt3sM0w824ejX5/wKwkpi1NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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